Improvement in riveting-machines



J. BERRY.

Riveting-Machines Patented Nov. 26, I872.

m my 3 UNITED STATES PATENT OFFIoE.

JAMES BERRY, OF BUFFALO, NEW YORK, ASSIGNOR TO HIMSELF AND HENRY BERRY,OF SAME PLACE.

IMPROVEMENT IN RIVETlNG-MACHINES.

Specification forming part of Letters Patent No. 133,294, dated November26, 1872; antedated November 23,

To all whom it may concern:

Be it known that I, Jar/res BERRY, of the city of Buffalo, in the countyof Erie and State of New York, have invented certain Improvements inBiveting-Machines, of which the following is a specification:

. My invention relates to that class of rivetin g-machines forimprovements in which Letters Patent of the United States were grantedto me, and dated, respectively, November 29, 1870, and .;August 22,1871, to which patents reference is here made for a full description ofsaid machines.

These machines are adapted to receive and hold a number of rivets at arelative distance apart, to correspond with the holes in the parts to beriveted together, in which the rivets are inserted simultaneously by anelevating device, when all of the rivets are headed by a singlecontinued operation. These machines consist generally of a table ormandrel provided with a groove in which are arranged two socketedclamping-jaws for holding the rivets before they are inserted. in theparts to be riveted, and mechanism for elevating the rivets, composed ofa series of pins secured to a rod or bar and projecting upward into thesockets of the clamping'jaws, the said bar ang pins being elevated bywedges at each on My invention consists, first, in the combination, witha riveting table or mandrel, socketed clamping-jaws, and detachedrivet-elevating pins, of an eccentric shaft for elevatin g said pins, ashereafter more fully explained; second, in the combination witharevolvingrivsting-mandrel, provided with socketed clampbars, a seriesof detached pins, and an eccentrio shaft for elevating the latter, ofsuitable stops by which the revolving movement of the eccentric shaft inthe mandrel is arrested, after the rivets are elevated and transmittedto the mandrel, whereby the latter is revolved in its hearings in orderto bring a solid poriion of the mandrel under the rivets preparatory toheading the same, by a continuation of the same movement of thehand-lever or other device by which the shaft is rotated.

In the accompanying drawing, Figure I is a longitudinal elevation of arivetingmandrel provided with my improvements. Fig. II is an end viewthereof, showing the position of the stop when the detached pins arelowered. Fig. III is a similar view with the pins raised. Fig. IV is across-section of the mandrel, showing the pins lowered. Fig. V is asimilar view, showing the pins raised. Fig. V1 is a fragmentary plan view of the mandrel.

Like letters designate like parts in each of the figures.

A is the cylindrical mandrel supported in the standard a or othersuitable bearing in which it turns. B represents the clampingjawsprovided with sockets b for the reception of the rivets, and operated byset-screws or other suitable mechanism, as described in my aforesaidpatents. c c are the detached pushpins fitting loosely in the base ofthe sockets b in which the rivets are placed. When the sockets b aremade V-shaped to better clamp rivets of unequal size, as shown in thedrawing, the lower portion of said sockets are pref: erably madecylindrical, as shown at b, to form bearings or guides forthe pins 0.The latter are provided with an enlargement or head, 0, at their lowerend, to prevent their falling out of the sockets when the mandrel isturned half around. D is the eccentric shaft by which the pins 0 areraised. It is arranged centrally below the jaws Bin a longitudinal bore,01, of the mandrel. It is constructed at the inner end with a journal,d, arranged eccentrically, as clearly shown by dotted lines in Figs. IVand V, and at the outer end with a cylindrical enlargement, 01 concentric with the journal il and fitting in the bore (1 of the mandrel.The shaft D is retained in the mandrel against longitudinal displacementby a pin engaging in an annular groove, 0, formed in the portion d ofthe shaft, or by any other suitable device. The shaft is turned by anysuitable lever or other device at its outer end. By giving the shaft D ahalf revolution it operates as a wedge forced laterally under the pinsand raises them from their lower positions, (shown in Fig. IV,)

to the surface of the mandrel, as shown in Fig.

V, so as to free the rivets from the sockets and permit the mandrel tobe turned. The rivets being elevated as just described,'the furtherrotation of the shaft in the mandrel is prevented by any suitable stopdevice. In the drawing astop, f, is'shown projecting from the outer endof the mandrel, so as to engage, when the shaft has reached the requiredposition, with a corresponding lip, g, projecting from the shaft, whichlocks the shaft and mandrel together.

in its bearings with the shaft so as to bring a solid portion of thesame under the rivets, which are then headed in the usual manner. Afterthe rivets are headed the mandrel is rotated in the same direction untilbrought to its former position, when, by a reverse movement of thehandle 0, the pins are allowed to descend, which they readily do bygravity, to their original position, ready for a second operation.Instead of the eccentric shaft for elevating the pins, a simple wedgearranged under the base of the pins, so as to be moved By continuing themovement of the actuating-lever e the mandrel is turned 133,29&

laterally, may be used instead, especially with a stationaryriveting-table. Also, a series of levers, arranged under each pin, andconnected together so as to be simultaneously operated, may be used,although I prefer the arrangement of the eccentric shaft, as'shown inthe drawing.

I claim as my invention- 1. The combination, with a riveting table ormandrel, socketed clamping jaws, and detached rivet-elevating pins, ofthe eccentric shaft D, as hereinbefore set forth.

2. The combination, with the riveting-mandrel A, clamping-jaws B,detached pins 0, and eccentric shaft D, of a suitable stop device, f g,for arresting the rotation of the shatt in the mandrel, substantially ashereinbefore set forth.

JAMES BERRY.

Witnesses:

JOHN J. BONNER, EDWARD WILHELM.

